Question

x.17,7-7,7.x=177

9.(12-2.x)=54

Answer 1

a) x . 17,7 - 7,7 . x = 177

\(\Rightarrow\) x . ( 17,7 - 7,7 ) = 177

\(\Rightarrow\) x . 10 = 177

x = 177 : 10

x = 17,7

b) 9 . ( 12 - 2 . x ) = 54

\(\Rightarrow\) 9 . ( 10 . x ) = 54

10 . x = 54 : 9

10 . x = 6

x = 6 . 10

x = 60

Answer 2

\(x.17,7-7,7.x=177\)

\(\Rightarrow x.\left(17,7-7,7\right)=177\)

\(\Rightarrow x.10=177\)

\(\Rightarrow x=177:10=17,7\)

Answer 3

\(9\left(12-2x\right)=54\)

\(\Rightarrow12-2x=54:9=6\)

\(\Rightarrow2x=12-6=6\)

\(\Rightarrow x=6:2=3\)